Saxophone Forum

Hello to everyone from the Island of Puerto Rico

My fathers father gave me an Alto Sax over 30 years ago. With my busy life i stored it away for about 25 years but this weekend I went to see Kenny G. in concert here in the island and it was such a great experience that I want to get back into play my old Sax. The horn is a Alto Buffet Crampon SN 6742. It looks its age but sure STILL sound great. Can anybody shine some light in my direction to how to find out my sax's age?
Thanks in advance and what a great forum to be part of.